WP / joomla not working on PHP 7

Hi everybody,

Updated unsuccesfully some working WP and Joomla sites from PHP 5.6 to 7.0.11.
Under FastCGI I get 500 error and under FPM-Apache I get "service temporarily unavailable".

For 500 error, error log shows:
[fcgid:warn] [pid xxxxx:tid 115672779593472] (104)Connection reset by peer: [client xxx.xxx.xxx.xxx:33348] mod_fcgid: error reading data from FastCGI server
[core:error] [pid xxxxx:tid 115672779593472] [client xxx.xxx.xxx.xxx:33348] End of script output before headers:...

WP / joomla not working on PHP 7